/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.xml.security.stax.impl.stax;

import java.io.IOException;
import java.io.Writer;

import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamException;

import org.apache.xml.security.stax.ext.stax.XMLSecProcessingInstruction;
import org.apache.xml.security.stax.ext.stax.XMLSecStartElement;

/**
 */
public class XMLSecProcessingInstructionImpl extends XMLSecEventBaseImpl implements XMLSecProcessingInstruction {

    private final String data;
    private final String target;

    public XMLSecProcessingInstructionImpl(String target, String data, XMLSecStartElement parentXmlSecStartElement) {
        this.target = target;
        this.data = data;
        setParentXMLSecStartElement(parentXmlSecStartElement);
    }

    @Override
    public String getTarget() {
        return target;
    }

    @Override
    public String getData() {
        return data;
    }

    @Override
    public int getEventType() {
        return XMLStreamConstants.PROCESSING_INSTRUCTION;
    }

    @Override
    public boolean isProcessingInstruction() {
        return true;
    }

    @Override
    public void writeAsEncodedUnicode(Writer writer) throws XMLStreamException {
        try {
            writer.write("<?");
            writer.write(getTarget());
            final String data = getData();
            if (data != null && !data.isEmpty()) {
                writer.write(' ');
                writer.write(data);
            }
            writer.write("?>");
        } catch (IOException e) {
            throw new XMLStreamException(e);
        }
    }
}
